Brake shoe fitter



Jn. 17,V 1939. I c. w. BAUBERGER Er AL- vBRAKE SHOEl FITTER FiledApIil 14, 1937 Patented Jan. 17, 1939 PATENT OFFICE BRAKE SHOE FITTER Charles W`. Bauberger and Edward T. Liess, Malverne, N. Y.

Application April 14, 1937, Serial No. 136,721

7 Claims.

Our invention relates generally tov devices for reshaping brake shoes for motor vehicles.

It is of the greatest importance that the brake shoe shall t or conform perfectly to the drum in order to ensure proper and effective operation. If there is a slight hump or high spot there will be ineffective and noisy operation.

We have sought therefore to provide a simple and convenient device by means of which a brake l@ shoe may be reshaped or fitted to the surface of the drum. We have especially designed a device which may be used by an ordinary mechanic in a garage. For this purpose the device should be simple and rugged and adapted to be used to l5 `iit or conform to brake shoes of different sizes. It should also be adapted to expand or contract the shoe by simple changes in the set-up.

For these purposes, we provide a base and a number of abutment posts some or all of which may be adjusted in position. A cam or eccentric is mounted on one post in a position to engage a shoe held against two other posts.

In the drawing, Fig. 1 is a plan view of one form of device embodying our invention. Fig. 2 is a front View partly in section on the line 2-2 of Fig. 1, with the front posts missing.

Fig. 3 is a perspective view of one of the abutment posts.

Fig. 4 is a perspective view of a cam member and associated parts.

A simple form of our improved tter comprises a base I0 formed of a casting and provided with legs II which may be perforated for fastening to a support. The base may be hollow with a oor I2 and an open bottom.

The floor portion is formed with a plurality of elongated divergent slots, three being illustrated, i. e. a central slot I3 and two outer slots I3. The slots have an appreciable depth as will be seen from Fig. 2 and their side walls are formed with corrugations or teeth I4.

Adapted to be removably mounted in the slots are metal abutment members I5. Each consists of a block I6 having its side walls formed with corrugations or teeth I1 conforming to the corrugations I4 in the slots. A post or peg I8 extends upwardly from the block. IIhe lower end of the block terminates in a bevelled end I9. These abutments members may be positioned in various adjusted positions in the base.

' A metal cam member 28 is formed by boring an eccentric hole 2| in a cylindrical member. This cam 20 may be movably mounted on any of the posts or pegs I8. A lever 22 may be employed to actuate the cam member.

In using the improved fitter, a brake shoe 23 is placed on the floor I2 so that its central portion is adjacent the central slot I3 and its ends span the outer slots I3. If it is desired to flatten or widen the arc of the brake shoe, the shoe is 5 placed in the position shown in Fig. l. An abutment member I5 is placed in each of the outer slots I3 and the ends of the shoe on the side having the ange 24 are brought up against the abutments in the outer slots I3. An abutment lof;

member I5 is mounted in the central slot I3 on the opposite side of the brake shoe and cam member 20 is mounted thereon so that its cam face can operate on the face 25 of the brake shoe. the direction of the arrow of Fig. l will exert a pressure or a camming action on the central portion of the arc oi the brake shoe and due to the engagement of the ends of the shoe with the abutments in the slots I3 on the opposite side to 20 the cam said movement will cause the arc of the shoe to be attened out.

In order to prevent injury to the face or lining 25 of the brake shoe, a protective shoe 26 may be loosely mounted on cam member 2E) by means 25 of a spring 21. This shoe is positioned between the cam member and the face of the brake shoe and its surface adjacent the cam member is curved to the shape of the cam, its opposite surface being plane. 30

If it is desired to contract the brake shoe, the abutments I5 in the outer slots I3 are placed on the side of the shoe opposite to the flange 24 and the abutment I5 ispositioned in the central slot I3 on the side of the shoe having the flange 35 24, or on the side opposite to that shown in Fig. l. Movement of the lever will exert a camming action against the central portion of the brake shoe and due to the engagement of the ends of the shoe with the abutments in the slots I3 on 40 the opposite side will cause the arc to be contracted. It is preferable that protective shoes 26 be placed on the pegs I8 of the abutments in the outer slots I3' when contracting the arc of the brake shoe in order to prevent injury to the face 45 or lining of the brake shoe.

As there is no danger of injury to the angc 24 of the brake shoe, it is not necessary to provide shoes 26 on any of the pegs of the abutments in the outer slots I3' when flattening the arc.

It will be understood that the abutments I5 may be moved along the slots I3 and I3' in order to provide space to receive any size shoe therebetween.

The lower ends of the blocks I6 are bevelled so 55 Movement of the lever 22 horizontally in i511 that dirt may not get caked under the block. Openings 2B may be provided in the oor portions of the slots to permit removal of any dirt that may accumulate.

While we have illustrated six posts I5 in the slots, it will be understood that only three of these posts, a central post in the slot I3 and two end posts in the slots I3 are used at one time.

When six posts are used as illustrated, it is only necessary to remove the cam member and place it on the central post in the slot I3 necessary to effect the desired attening or contracting of the arc of the shoe.

We claim: o

l. A brake shoe tter comprising a base having a central elongated slot and an elongated slot on either side of said central slot and diverging therefrom, the walls of said slots being corrugated, a removable abutment post in each of said slots and adjustable therealong, said abutment posts being spaced from each other to receive a brake shoe therebetween, a removable cam member on one of said abutment posts and a protective shoe between said cam member and the brake shoe.

2. A brake shoe fitter comprising a base having elongated radial slots, each slot having a oor, spaced blocks removably iitted in said slots and seated on the oors of saidl slots, means for securing said blocks against longitudinal movement in said slots, an abutment post on each block extending above the upper surface of the base and against which a brake shoe is adapted to impinge and a cam removably supported on one of said abutment posts and being adapted to be wiped over the brake shoe, the bottom portion of each block being bevelled to afford a space between the block and walls of the slot to accommodate foreign matter, the iloor of each slot having an opening for removing said foreign matter.

3. A brake shoe fitter comprising a base having a surface for supporting a brake shoe and having three converging slots, each slot having a row of teeth and grooves along at least one of its side walls, a block removably fitted in each slot and having grooves and teeth to interlock with the teeth and grooves of the side Wall o1' the slot in which the block is mounted, each block having a post projecting from the supporting surface of the base, and a cam mounted on the post of the block in the central slot, each block with its post being adapted to be located on either side of a brake shoe supported .on the base.

4. A brake shoe fitter comprising a base having at least three elongated diverging slots therein, blocks detachably mounted in said slots, interfltting projections on the side walls of said blocks and slots to prevent longitudinal movement of each block in its respective slot, an abutment post projecting from each block, and an eccentric cam movably mounted upon at least one post for pressing against a brake shoe supported against two other posts for changing the shape of said shoe.

5QA brake shoe fitter comprising a base, two pairs of abutment posts mounted upon said base, each pair of posts lying on a line divergent with the line of the other pair of posts, an elongated slot in said base between said pairs of posts, a block removably mounted in any part of the length of said slot, means for holding said block in fixed longitudinal engagement with respect to said slot, an abutment post projecting from said block, and eccentric cam means movably mounted on said post.

6. A brake shoe fitter comprising a base having a shoe-supporting surface and three abutment posts carried by the base and spaced apart from each other so that two of the posts serve as abutments for the opposite ends of a brake shoe and the third abutment post is located intermediate the other two, said base having an elongated slot between the first two mentioned posts, said slot and said third abutment post having interlocking parts permitting said latter post to be adjusted longitudinally of said slot and a cam rotatably mounted on said third mentioned post for coacting with .a portion of a brake shoe between its ends to bend the brake shoe.

7. A brake shoe tter comprising a base for supporting a brake shoe, three abutment posts carried by the base and projecting therefrom in position to lie adjacent the ends and the central part of a brake shoe respectively, said posts being arranged on an arc corresponding generally with the curve of the brake shoe to be adjusted, said base having an elongated slot extending substantially radially of said arc, one of said posts and the walls of said slot having intertting grooves and projections permitting said post to be inserted into said slot at any one of several different positions to thereby adjust the position of said post with respect to the other posts and a cam mounted to rotate on one of said posts for coacting with a portion or a brake shoe supported by the other two posts and thereby bend the shoe.

CHARLES W. BAUBERGER. EDWARD T. LIESS. 

